Engine Hesitates
- Check for clutch slipping or brakes dragging.
- Check for vacuum leaks.
- Check air filter.
- Verify secondary ignition system performance and timing.
- Verify proper compression and valve clearance.
- Ensure fuel system (pump, lines, filter and pressure regulator) performs properly.
- Check for clogged fuel injectors.
- Check variable induction system (if equipped).
- Check power to ECU via fusible links, fuses and EFI main relay.
- Check airflow meter, coolant temperature sensor, air temperature sensor and throttle position sensor.
- Check injection signal circuit.